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Raychem Trace Heating Cables

Smart heat for comfort and safety

As the world leader in heat-tracing systems, Pentair Thermal Management has the system that you need from pipe-freezing prevention or maintaining fluid temperatures, to melting snow and heating floors.

For commercial or residential applications, new construction or renovation, these smart solutions will perform perfectly for greater comfort and safety.

Raychem VIA-DU-20 Control Unit

Raychem Part Number: 599514-000
Image of VIA-DU-20 Control Unit with sensors

The VIA-DU-20 is a CE certified, electronic control device designed to regulate Raychem ramp heating systems in garage driveways, staircases, inclines etc.

The buried heating cable is controlled by sensing both ground temperature and moisture. The heater operates only when the temperature falls below the set value and there is moisture.

Use of this controller results in significant energy savings if compared to other devices that regulate according to temperature only.

Control unit with combined moisture and temperature sensor and optional ambient temperature sensor.

  • Compatible with all EM snow melting systems
  • With temperature and ice/snow sensor
  • Optional ambient sensor
  • DIN-rail mounting
  • Sensor cable length: 15m
  • Freezing rain precaution
  • Optional BMS connection
  • Alarm relay contacts

Technical Specification

  • Operating Voltage: 230Vac ±10%, 50/60Hz.
  • Power Consumption:14VA Max.
  • Main Relay (Heating):4A 250Vac, SPST, Voltfree
  • Alarm Relay: 2A 250Vac, SPDT, Voltfree
  • Accuracy: ±1K
  • Mounting:Din Rail
  • IP Classification:IP20
  • Temperature Resistance: 0°C to 50°C.
  • Setpoint temperature: 1°C to 6°C (settable)
  • Moisture settings: 1 (low moisture) to 10 (high moisture)
  • Post-heating on time settings:+30 minutes to +120 minutes
  • Non-volatile memory (Power failure): Yes, Parameters remain saved.


Image of VIA-DU-S20 Sensor

Raychem VIA-DU-S20 Ground Temperature and Moisture Sensor

Raychem part number: 034898-000
  • Voltage: 8Vdc (Via the VIA-DU-20)
  • Sensor Type: PTC
  • IP Classification: IP65
  • Cable length: 15m, extendable to 50m (5 x 1.5mm2)
  • Temperature Resistance: -30°C to +80°C.
Image of VIA-DU-A10 Sensor

Raycham VIA-DU-A10 Ambient Sensor

Raychem part number: 130616-000
  • Sensor Type: PTC
  • IP Classification: IP54
  • Terminals: 1.5 to 2.5mm2
  • Sensor cable: 2 x 1.5mm2, Max 100m (Cable not included.)
  • Temperature Resistance: -30°C to +80°C.